IPhone: Should I get unlimited Wi-Fi or text?

I currently have unlimited text, but no one uses iMessage anymore, and my friends always text me on Kik, Wechat, and Viber. I feel like I'd get unlimited Wi-Fi because when I'm outside at a park, I can't get notifications, and if we want to meet up, I can't text them. I'd call them, but I think that'd be too bothersome, and since no one ever calls me frequently, they just text. Another thing, I like iMessage because it saves your chats and conversations, so then you can re-read them later if your bored. I'm a very indecisive girl, what do you think I should do? I can't get both because then that would cost $68. Unlimited texting is $28 and unlimited Wi-Fi is $30.

Walmart Strait Talk phone service gives you unlimited everything including data for a flat 45$ with no contract. With an iphone you will have to order a strait talk chip to put in your iphone. They cost about 25$. My son had done 2 one for him and his wife and they work great.